A033961 Number of different sets ("cut sets") of triangles a regular (n+2)-gon can be dissected into; two triangulations of an (n+2)-gon are equal if all numbers of congruent triangles coincide.

1, 1, 2, 2, 4, 6, 11, 17, 35, 57, 115, 203, 412, 745, 1546, 2838, 5901, 11154, 23255, 44263, 93169, 179214, 377441, 733151, 1547068, 3020878, 6399874, 12543862

Offset: 2

Author

Heiko Harborth (i1031901(AT)ws.rz.tu-bs.de)

Keywords

• nonn
• more

References

• Iuliana Dochkova-Todorova, Computer Methods and New Values for Cut Set Catalan Numbers, ICEST (2012), 206-207.
• J. Dochkowa, H. Harborth and I. Mengersen, Cut set Catalan numbers, Congressus Numerantium, Proceedings of the Twenty-ninth Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, FL, 1998). Congr. Numer. 130 (1998), 133-139.

Links

• Sean A. Irvine, Java program (github)

Extensions

a(20)-a(29) from Dochkova-Todorova added by Sean A. Irvine, Jul 26 2020